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Sports Research NAC N-Acetyl-Cysteine 600 mg supplement bottle
Sports Research

NAC N-Acetyl-Cysteine 600 mg Review

What We Researched
1 active ingredient analyzed · 3 inactive ingredients decoded · 11 brand certifications checked · Page generated: Sep 2026
100
Product Score Excellent
100
Brand Score Excellent

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
N-Acetyl-L-Cysteine (NAC) 600 mg †
Bioavailability Excellent

Absorption Rating

  • N-Acetyl-L-Cysteine (NAC) Good
Other Ingredients Excellent

Fillers & Additives

  • Veggie Capsule (Hypromellose)
  • Rice Flour
  • Silicon Dioxide
Efficacy Excellent

Dosage Analysis

  • N-Acetyl-L-Cysteine (NAC) 600 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
N-Acetyl-L-Cysteine (NAC) 600 mg †

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Veggie Capsule (Hypromellose) Safe

It is used to encapsulate the supplement ingredients.

Rice Flour Safe

Natural bulking agent to fill capsule space. Hypoallergenic.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Brand Trust Report
Sports Research

Founded 1980 · San Pedro, California, United States · 135 products · sportsresearch.com/

Certifications

11 certifications
Consumerlab Source available Primary evidence
Informed Sport Source available Primary evidence
Non Gmo Project Source available Primary evidence
Nsf Certified For Sport Source available Primary evidence
Gluten Free Gfco Source available Primary evidence
Usda Organic Source available Primary evidence
NSF Certified for Sport Supporting evidence unavailable
NSF Contents Certified Supporting evidence unavailable
Informed Choice Supporting evidence unavailable
IGEN Non-GMO Tested Supporting evidence unavailable
Vegan Action Certified Supporting evidence unavailable

Transparency

5 claims
Third Party Testing Claim — Verified Evidence available Evidence
Coa Availability — Claimed Brand claim; evidence unavailable
Testing Lab Disclosure — True Brand claim; evidence unavailable
Contains Proprietary Blend — True Brand claim; evidence unavailable

Violation History

4 incidents
Prop 65 Lead2024-11-15 Source available Primary source
Lawsuit False and misleading claims of "weight management" and "appetite suppression" on Garcinia Cambogia product.2024 Source available Primary source
Prop 65 Lead2021-10-25 Source available Primary source
Lawsuit False and misleading claims on the labeling of Premium MCT Oil and Turmeric Curcumin C3 Complex products.2020 Source available Primary source
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Frequently Asked Questions
Is Sports Research NAC N-Acetyl-Cysteine 600 mg a good supplement?

Sports Research NAC N-Acetyl-Cysteine 600 mg received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients with 90 servings per container. All 3 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Sports Research, holds a brand trust score of 100/100.

What are the ingredients in Sports Research NAC N-Acetyl-Cysteine 600 mg?

Sports Research NAC N-Acetyl-Cysteine 600 mg contains 1 active ingredients: N-Acetyl-L-Cysteine (NAC) (600 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Sports Research NAC N-Acetyl-Cysteine 600 mg safe to take?

GoodSupp reviewed the inactive-ingredient data available for Sports Research NAC N-Acetyl-Cysteine 600 mg. All 3 inactive ingredients — including capsule materials, fillers, and binders — are currently classified as safe in GoodSupp's ingredient reference data. This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Sports Research a trustworthy supplement brand?

Sports Research receives a brand trust score of 100/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1980 and headquartered in San Pedro, California, United States, the company offers 135 products in their lineup. Note: Sports Research has 4 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records — read our methodology. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.